Two-photon decay of light scalars: a comparison of tetraquark and quarkonium assignments

Abstract

Two-photon decays of light scalar mesons are discussed within the quarkonium and tetraquark asignements: in both cases the decay rate of the sigma resonances turns out to be smaller than 1 keV.

arXiv commentTalk given at the XII International Conference on Hadron Spectroscpy, (Hadron 07), Frascati (Rome), 8-13 October 2007

References in corpus (1)

• On the two-photon decay width of the sigma meson

Cited by in corpus (6)

• Comprehensive Amplitude Analysis of $\gamma \gamma \to {\pi }^{+}{\pi }^{-},{\pi }^0{\pi }^0$ and $\overline{K}K$ below 1.5 GeV
• Decay of light scalar mesons into vector-photon and into pseudoscalar mesons
• Two-photon decay of a light scalar quark-antiquark state
• Spontaneous breaking of chiral symmetry, and eventually of parity, in a $\sigma$-model with two Mexican hats
• Phenomenology of a pseudoscalar glueball and charmed mesons
• Decay widths of resonances and pion scattering lengths in a globally invariant linear sigma model with vector mesons